Quiz 5 Flashcards
1
Q
- It is the theoretical and applied science of the mechanical
behavior of rock masses.
a. Rock mechanics C. Soil mechanics
b. Geo-mechanics d. Structural geology
A
a
2
Q
- It is concerned with the mechanical responses of all geological
materials including soil.
a. Mineral mechanics C. Geo-mechanics
b. Rock mechanics d. Soil mechanics
A
C
3
Q
- The concept that used to describe the intensity of internal forces
set up in a body under the influence of a set of applied surface
force.
a. Force C. Stress
b. Strain d. Movement
A
C
4
Q
- It defines the shear stress components vanish, that is possible
to select a particular orientation for a plain such that it is subject
to normal stress.
a. Stress Transformation C. Principal Stress
b. Stress Invariance d. Principal Plane
A
d
5
Q
- The way to describe qualitatively in which stress and strain are
related in a material under load.
a. Constitutive Behavior C. Poisson’s ratio
b. Elasticity d. stress
A
a
6
Q
- It ranks second to isotropic elasticity in the degree of expression
of elastic symmetry in the material behavior.
a. Transverse isotropic elasticity C. Modulus of Rigidity
b. Modulus of elasticity d. Poisson’s ratio
A
b
7
Q
- The term used to describe the intact rock between discontinu-
ities.
a. Rock Mass C. rock material
b. Aperture d. filling material
A
C
8
Q
- It is the total in situ medium containing bedding planes, faults,
joints and other structural feature.
a. Rock material C. rock mass
b. Lithology d. structure
A
C
9
Q
- It is the nature and distribution of structural features within the
rock mass.
a. Stress C. rock material
b. Geologic features d. Rock structure
A
d
10
Q
- The fractures on which identifiable shear displacement has
taken place.
a. Spacing C. Persistence
b. Faults d. discontinuity
A
b
11
Q
- The perpendicular distance between adjacent discontinuities.
a. Dip C. Strike
b. Dip angle d. Spacing
A
d
12
Q
- Term used to describe the aerial or size of a discontinuity with
a plane.
a. Aperture C. Persistence
b. Aerial photo d. Stereo net
A
C
13
Q
- The distance range of discontinuity spacing which is consid-
ered as extremely close spacing.
a. 20 -60 mm. C. 50 -200 mm.
b 60-200 mm. d. 60-200 mm.
A
d
14
Q
- The distance range of discontinuity spacing which is consid-
ered as very wide spacing.
a. 10 -25 mm. C. <20 cm.
b. 10 -20 mm. d. <20 mm.
A
C
15
Q
- The distance range used of discontinuity spacing which is
considered as extremely close spacing.
a. 200-6000 mm. C. 2500-3000 mm.
b. 200-600 mm. d. >6000
A
b
16
Q
- It pertains to the surface unevenness and waiveness of the
discontinuity relative to its mean plane.
a. Contour Line C. Persistence
b. Roughness d. Texture
A
b
17
Q
- The distance separating the adjacent rock walls of an open
discontinuity in which the intervening space is filled with air or
water.
a. Filling C. Aperture
b. Dip d. Spacing
A
C
18
Q
- The term used to describe material separating the adjacent
rock walls of discontinuities.
a. Filling C. Intrusion
b. Vein d. Contact rocks
A
a
19
Q
- It is the formation of planes of separation in the rock material.
a. Bedding plane C. fracture
b. Filling d. Rock mass
A
C
20
Q
- When the rock reach its maximum stress, usually averaged
over a plane, the rock can sustain under a given set of conditions.
a. Yield C. effective
b. Strength d. Stress
A
b
21
Q
- It is the basic technique used in mapping surface of under-
ground exposures.
a. Structural mapping C. Scan-line survey
b. Scan-line mapping d. Stereo netting
A
C
22
Q
- Set of line on the surface of the rock mass, and the survey
consists of recording data for all discontinuities that intersect the
scan line along its length.
a. Scan-line C. RMR data
b. Structural data d. MRMR data
A
a
23
Q
- A most reliable way of exploring the interior of a rock mass
prior to mining.
a. Geochemistry C. Core drilling
b. Geo-statistics d. Geophysics
A
C
24
Q
- The intersection of the plane and surface of the plane
a. Semi-circle C. node
b. Great circle d. pole
A
b
25
Q
- A line perpendicular to the plane and passing through center of
the sphere at two diametrically opposite points is called
of the plane.
a. Poles C. nodes
b. Projection d. zenith
A
a
26
Q
- It is the process by which sudden loss of strength occurs
across a plane following little or no permanent deformation.
a. Ductile C. Deformation
b. Brittle fracture d. Failures
A
b
27
Q
- When rock can sustain further permanent deformation without
losing load carrying capacity, this rock is experiencing
a. Effective stress C. failure
b. Strength d. ductile deformation
A
d
28
Q
- It is the stress, which governs the gross mechanical response
of a porous material.
a. Effective stress C. Effective strain
b. Pore pressure d. porosity
A
a
29
Q
- The strength of a fractured mass is:
A. unlimited C. zero E. infinite
B. purely frictional D. nil
A
C
30
Q
- Which of the following methods is most applicable in mapping or
locating wet shears, clays and gravel deposits and in determining
their thicknesses?
A. gravity C telluric E. seismic
B. magnetic D. resistivity
A
d
31
Q
- In interpreting topo maps, overlapping topographic contours
represent which of the following surface formation
A. basin C. dome E syncline
B.anticline D. overhang
A
d
32
Q
- In rock mechanics, the ratio of the stress to the strain is called:
A. tensile strength C. poisson’s ratio E. shear strength
B. rapture limit D. modulus of elasticity
A
d
33
Q
- The process of ejecting a mixture of cement and sand into the
crevices of rocks, usually through a
borehole drilled into the rock to be grouted.
A guniting C. grouting E. sealing
B. shotcreting D. rockbolting
A
C
34
Q
- Water pressure reduces stability of pit slope by:
A. reducing the shear strength of potential failure surfaces
B. reducing the tensile strength of potential failure surfaces
C. increasing the shear strength of potential failure surfaces
D. increasing the tensile strength of potential failure surfaces
A
a
35
Q
- Which of the following physical properties of rocks refers to the
weight of said rocks in an equivalent volume of water measured
at sea level.
A. porosity C. tonnage factor E. coefficient of expansion
B. specific gravity D. bond work index
A
b
36
Q
- The concept that used to described the intensity of internal
forces set up in a body under the influence of a set of applied
surface force.
A. force C. Stress E. aperture
B. strain D. movement
A
C
37
Q
- The way to describe qualitatively in which stress and strain are
related in a material under load is
called:
A. constitutive behavior C. poisson’s ratio E. plasticity
B. elasticity D. stress
A
a
38
Q
- The term used to describe the intact rock between disconti-
nuities is called :
A. rock mass C. aperture E. spoils
B. rock material D. filling material
A
b
39
Q
- The total in-situ medium containing bedding planes, faults,
joints and other structural feature is
called :
A.rock material C. lithology E. filling material
B. rock mass D. structure
A
b
40
Q
- It is the nature and distribution of structural features with the
rock mass.
A. stress C. geologic features E. rock material
B. rock structure D. geologic contact
A
b
41
Q
- It is a fracture on which identifiable shear displacement has
taken place.
A. spacing C. persistence E. strain
B. faults D. fissure
A
b
42
Q
- It is the perpendicular distance between adjacent discontinu-
ities.
A. dip C. strike E. geologic contact
B. dip angle D. spacing
A
d
43
Q
- The term used to described the aerial extent or size of a
discontinuity with a plane.
A. aperture C. aerial photo E. discontinuity
B. persistence D. stereo net
A
b
44
Q
- It is the stress which governs the gross mechanical response
of a porous material.
A. effective stress C. pore pressure E. porosity
B. effective strain D. porosity
A
a
45
Q
- When the rock can sustain further permanent deformation
without losing load carrying capacity,
this rock is experiencing.
A. effective stress C. effective strain E. plasticity
B. pore pressure D. ductile deformation
A
d
46
Q
- It is the process by which sudden loss of strength occurs
across a plane following little or no
permanent deformation.
A. ductile C. deformation E. yield
B. brittle fracture D. failures
A
b
47
Q
- The most reliable drilling methods of exploring the interior of
a rock mass prior to mining
A. rotary drilling C. percussion drilling E. churn drilling
B. auger drilling D. core drilling
A
d
48
Q
- It is a basic technique used in mapping surface or underground
exposures.
A. structural mapping C. scanline mapping E. stereo netting
B. scanline survey D. aerial mapping
A
b
49
Q
- Which of the following natural properties posses the best elastic
properties?
A. limestone C. diorite E. dacite
B. gypsum D. clay
A
d
50
Q
- In interpreting geologic maps, limestone is always character-
ized by which of the following?
A. karst topography C. high relief E. overhangs
B. gentle rolling terrain D. wetlands
A
a
51
Q
- Which of the following physical properties of rocks refers to the
ratio between the volume of voids or
open spaces inside a rock mass and the total volume of said rock
mass or material?
A. permeability C. porosity E. bond work index
B. expansion ratio D. specific gravity
A
C
52
Q
- Which of following refers to the maximum slope at which a heap
of loose material can stand
without sliding?
A. angle of draw C. drainage angle E. working slope
B. gradient slope D. angle of repose
A
d
53
Q
- Indirect tensile strength is also called what?
A. brazilian disc test C. rapture test E. ring test
B. tri-axial test D. work index test
A
a
54
Q
- The rate of change of strain as a function of stress.
a. Modulus of Elasticity C. Modulus of Bending e. Poisson’s Ratio
b. Modulus of Rigidity d. Modulus of Plasticity
A
a
55
Q
- Rocks can virtually withstand unlimited load provided that:
A. it is initially rock bolted B. the load is applied slowly
C. enough confining pressure is provided
D. artificial support is installed
E. a long period of loading time is allowed.
A
C
56
Q
- Which of the following natural materials posses the best elastic
properties?
A. lignite C. gypsum E. anthracite
B. clay D. limestone
A
b
57
Q
- When a massive rock mass is faulted, what do you call the
portion that is down thrown?
A. syncline C. footwall E. anticline
B. hanging wall D. plug
A
C
58
Q
- Indirect tensile strength is also called :
A. Brazilian disc test C. ring test E. work index test
B. tri-axial test D. rapture test
A
a
59
Q
- A record of geologic facts in their correct space relations is
called what?
A. pit design C. geologic map E. core log
B. aerial photograph D. assay map
A
C
60
Q
- What is that field science that focuses on the study of the
properties and behaviour of rocks when subjected to force field?
A. rock mechanics C. slope stability E. ground control
B. strength of materials D. soil mechanics
A
a
61
Q
- In rock mechanics, what do you call the rock mass designation
that quantifies discontinuity by the ratio of the length of the indi-
vidual pieces of core recovered in a drill and the total length of the
drill run?
A. work index C. rock mass rating E. RQD
B. fracture spacing D. fracture pattern
A
e
62
Q
- The ratio of the material in its solid state as compared to its
volume when broken is called what?
A. weight/moisture factor C. powder factor E. volume/weight ratio
B. swell factor D. coefficient of expansion
A
b
63
Q
- A word commonly used in rock mechanics as a collective term
for all fractures or features in a rock mass such as joints, faults,
shears, etc. that have zero or relatively low tensile strengths is
called:
A. structure C. fracture plan E. discontinuity
B.lineation D. fabric
A
e
64
Q
- Which of the following natural materials possess excellent
plastic properties?
A. clay C. lignite E. gypsum
B.anthracite D. limestone
A
a
65
Q
- A record of geologic facts in their correct space relations is
called what?
A. pit design map C. aerial photograph E. assay map
B. geologic map d. core log
A
b
66
Q
- Which of the following rock formation is characterized by karst
topography?
A. diorite plug C. basalt dome E. coal formation
B. limestone formation D. andesite formation
A
b
67
Q
- Which of the following physical properties of rocks refers to the
ability of rocks that resist shearing?
A. rock work index C. tensile strength E. compressive strength
B. rigidity D. shear strength
A
d
68
Q
- It consists of one or more pieces of rock, usually between 1 to
3 meters long, and taken from a particular depth thru diamond drilling.
A. fish line C. core E. dead man
B. sludge D. blasthole cone
A
C
69
Q
- The strength of a fractured mass is :
A. infinite C. nil E. unlimited
B. zero D. purely frictional
A
b
70
Q
- In map interpretations, limestone formation is always charac-
terized by which of the following:
A. wetlands C. karst topography E. overhangs
B. high reliefs D. gentle rolling topography
A
C
71
Q
- A record of geologic facts in their correct space relations is
called:
A. geologic map C. pit design E. aerial photograph
B. core log D. assay map
A
a
72
Q
- One of the elastic properties of rocks is:
A. density C. specific gravity E. weight
B. porosity D. poisson’s ratio
A
d
73
Q
- It refers to the maximum slope at which any loose materials
comes to rest when poured or dumped
in a pile.
A. drain angle C. angle of draw E. working slope
B. angle of repose D. gradient slope
A
b
74
Q
- It is a geologic process where near surface rock or deposits are
altered thru chemical action of water,
plants and bacteria and the mechanical action of temperature.
A. natural deposition C. weathering E. landslide
B. metamorphism D. sedimentation
A
C
75
Q
- In rock mechanics, which of the following conventions is valid
in the stress and strain analysis?
A. compressive normal stresses are taken as positive
B. contractile normal strains are taken as negative
C. compressive normal stresses are taken as negative
D. the sense of positive shear is outward relative to the coordinate
origin
E. the positive directions of the coordinate axes are taken as
negative
A
b
76
Q
- Rock mechanics differ from classical mechanics in terms of?
A. none of these conditions
B. seismic forces are not considered in classical mechanics
C. the strength of rocks compared with steel
D. rock mechanics is applied and appreciated only in mining
E. in rock mechanics, the post failure characteristics of rocks are
more useful
and significant in mining than the pre-failure ones.
A
e
77
Q
- In slope stability analysis of a mine pit, which of the following is
necessary to address a slope stability problem?
A. characteristics of the rock mass
B. drainage system of the pit
C. blasting design
D. equipment used in the pit operation
E. all of the above
A
e
78
Q
- It is the ratio of the voids or open spaces w/in a material versus
the total volume of the said material:
A. hollow factor C. moisture E. specific gravity
B. porosity D. expansion ratio
A
b
79
Q
- A rock mass classification that quantifies discontinuity by the
ratio of the length of the individual pieces of core recovered in a
drill, having lengths of 10 cm or longer, and the total length of drill run:
A. fracture pattern C. fracture spacing E. RQD
B. work index D. rock mass rating
A
e
80
Q
- The ability of rocks to resist compression is called:
A. tensile strength C. shear strength E. rock strength
B. rigidity D. compressive strength
A
d
81
Q
- Limestone formations, whether folded or heavily faulted, are
what type of rocks?
A. deposited by man and machine
B. sedimentary rocks
C. vein-type deposits mineable by underground
D. volcanic origin
E. igneous rocks
A
b
82
Q
- A record of geologic facts in their correct space relations is
called:
A. core log C. geologic map E. pit design map
B. assay map D. aerial photographs
A
C
83
Q
- It is the maximum slope at which any loose materials comes to
rest when poured or dumped in a pile.
A. angle of repose C. working slope E. angle of draw
B. gradient slope D. drain angle
A
a
84
Q
- It is the field of study that is concerned in checking the proper-
ties and behaviour of rocks when subjected to force field:
A. strength of materials C. slope stability E. soil mechanics
B. rock mechanics D. ground control
A
b
85
Q
- It is the science of understanding the properties and mechanical
behaviour of rocks and rock formation and the nature of stresses
within them and their immediate environment.
A. strength of materials C. soil mechanics E. rock mechanics
B. rock surveying D. mapping and interpretation
A
e
86
Q
- In rock mechanics, ore core logging, RQD means :
A. rock grinding index C. rock bond index e. rock quality designa-
tion
B. rock identification D. rock hardness
A
e
87
Q
- A word commonly used in rock mechanics as collective term
for all fractures or features in a rock mass such as joints, faults,
shears, etc. that have zero or relatively low tensile strengths is
called:
A. fracture plan C. lineation E.fabric
B. structure D. discontinuity
A
d
88
Q
- Rock mechanics differs from classical mechanics in:
A. the strength of rocks compared with steel
B. in rock mechanics, the post failure characteristics of rocks is
more useful
and significant in mining than the pre-failure ones
C. rock mechanics is applied in mining
D. seismic forces are not considered in classical mechanics.
A
b
